Spring-hinge.



UNITED 'STATES PATENT OFFICE.y

Patented April 19, 1904,

HENRY L. FERRIS, OF HARVARD, ILLINOIS, ASSIGNOR TO HUNT, HELM, FERRIS 8cCOMPANY, OF lHARVARD, ILLINOIS, A CORPORATION OF ILLINOIS.

SPRING-HINGE.

SPECIFICATION forming part of Letters Patent No. 757,607, dated April19, 1904.

Application filed December 26, 1903. Serial No. 186,623. (No model.)

To @ZZ whom, t may concern,.-

Be it known that I, HENRY L. FERRIs, a citi- Zen of the United States ofAmerica, residing` at Harvard, in the county of `McHenry and State ofIllinois, have invented certain new and useful Improvements inSpring-Hinges, of which the following is a specification.

My invention relates to certain new and useful improvements inspring-hinges; and its object is to produce a device of this class whichshall have certain advantages, which will appear fully and at large inthe course of this specification.

. To this end my invention consists in certain novel features ofconstructlomwhich are clearly illustrated in the accompanying draw ingsand described herein.

In the aforesaid drawings, Figure l is an elevation of my improvedhinge. Fig. 2 is a horizontal section in the line 2 2 of Fig. l, andFig. 3 is a similar section'in the line 3 3 of Fig. l looking in thedirection of the arrow.'

Referring to the drawings, A is the doorjamb, to which one leaf of thehinge is secured, and B is the door.

C indicates one leaf of the hinge, which is formed of a single piece,preferably of' sheet metal, having a flat central portion c and twoupwardly-projecting ears o'. To the leaf C is secured a leaf D, which,like the leaf C, consists of a flat central portion CZ andupwardlyprojecting ears 0l. These leaves are connected by rivets E. Theleaf O has near its center an upwardly-projecting hook O', which ispreferably integral with the leaf C, but which can, if desired, be madein a separate piece. In the preferred construction the leaf C is made ofsheet metal. This hook is merely The operation of this hinge will beperfectly apparent. As the door is opened, the ends of the spring F aredrawn to the right in Fig. l, and consequently pull upon the spring, thetendency being in this position to close the door. This tendencycontinues until the ends of the spring swing past the plane determinedby the hook and the pivotal connections between the leaves. After thisthe ends of the spring swing to the left, and consequently the tendencyis to open the door. v

It will be seen that'this hinge is extremely simpleand can be madeentirely of sheet metal and is therefore very cheap. Furthermore, itoperates in a particularly effective manner, for the' reason that thespring is free to pivot on the hook C', swinging about this hook, asshown in the dotted lines in Fig. 2, and, furthermore, as tension is puton the spring the coil at its center is free to contract, the turns ofwire slipping on the hook, so that the spring utilizes a straight pullas distinguished from a torsional pull.

I realize that considerable variation is pos- 'sible in the details ofthis construction without departing from the spirit of the invention,and I therefore do not intend to limit myself to the specific formherein shown and described. Y

I claim as new ters Paten tf Y In a device of the class described, thecombination with two leaves having upturned ears pivoted together, of ahook upon one member substantially at its longitudinal center,perforations in the ears upon the other leaf, and a spring having acentral coil hooked over said hook, and having its ends extendingthrough said perforations.

In witness whereof I have signed the above application for LettersPatent, at Harvard, in

and desire to secure by Letthe county of McHenry and State of Illinois,

O. J. HENDmcKs, FLORENCE E; CRUMB.

